摘要
3-Aryl-l,2,4-benzotriazines were conveniently prepared in moderate to good yields from 1,1-bis（benzotriazol-1- yl）methylarenes with allylsamarium bromide/hexamethylphosphramide （allylSmBr/HMPA）. Preliminary results in- dicate that HMPA may enhance the reducing ability as well as prohibit the nucleophicility of allylSmBr, thus mak- ing allylSmBr/HMPA as a promising single-electron transfer （SET） reagent.
3-Aryl-l,2,4-benzotriazines were conveniently prepared in moderate to good yields from 1,1-bis（benzotriazol-1- yl）methylarenes with allylsamarium bromide/hexamethylphosphramide （allylSmBr/HMPA）. Preliminary results in- dicate that HMPA may enhance the reducing ability as well as prohibit the nucleophicility of allylSmBr, thus mak- ing allylSmBr/HMPA as a promising single-electron transfer （SET） reagent.
基金
Acknowledgement This work was financially supported by National Natural Science Foundation of China （No. 20802070） and the research foundation from Key Laboratory of Synthetic Organic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry （CAS）. We thank Professor Ran Hong at SIOC for helpful discus- sions.
